PuTTY bug pscp-psftp-fail-hang

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summary: PSCP/PSFTP hang on exit in some failure cases
class: bug: This is clearly an actual problem we want fixed.
priority: high: This should be fixed in the next release.
absent-in: 0.58 2006-08-13
present-in: 2006-08-27 0.59 0.60 2007-09-23
fixed-in: r8117 a071dfdcd2713f4e6569486e2da790fd21a0408d 2008-07-12 (0.61)

PSCP and PSFTP on Windows can hang on exit in various failure situations. Many of these involve the -batch option, which is embarrassing. For example:

User aborts at host key verification (or -batch is specified, which has the same effect).
-batch is specified and no non-interactive authentication method is successful.

Interestingly, Plink does not appear to hang in similar situations (and nor does PuTTY proper).

PSCP/PSFTP do not hang in all failure situations -- for instance, they appear not to hang when interactive password authentication fails.

Looking at when this crept in, it might be another side-effect of the introduction of the winhandl.c mechanism.

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Audit trail for this bug.

(last revision of this bug record was at 2016-12-27 11:40:21 +0000)